Jika x1 dan x2 merupakan akar akar persamaan x2 + 2x - 3=0 , maka (x1 - 2x2) (x2 - 2x1) =

Bab Persamaan Kuadrat

x^2 + 2x - 3 = 0
(x + 3)(x - 1) = 0

HP = {-3,1}

Nilai (x1 - 2x2)(x2 - 2x1)
= (-3 - 2(1))(1 - 2(-3))
= (-3 - 2)(1 + 6)
= -5 × 7
= -35